package com.wdc.application;

import java.util.Timer;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

public class SemaphoreDemo {
    public static void main(String[] args) {

        //线程数量 ： 停车位
        Semaphore semaphore = new Semaphore(3);

        for (int i = 0; i < 6; i++) {
            new Thread(()->{
                try {
                    semaphore.acquire();
                    System.out.println(Thread.currentThread().getName() + " 抢到车位");
                    TimeUnit.SECONDS.sleep(2);
                    System.out.println(Thread.currentThread().getName() + " 离开车位");

                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }finally {
                    semaphore.release();

                }
            }).start();
        }

    }
}
